Snowmelt runoff predictions for Boysen, Bull Lake, and Wind River

Frozen Boysen Reservoir, Winter 2020

Reclamation’s February forecast of the April through July runoff predicted for the Bighorn River Basin is as follows:

 Bighorn Lake – Bighorn River April through July inflow to Bighorn Lake is forecast to be approximately 1,216,400 acre-feet (af), which is 97% of the 30-year average of 1,256,400 af.

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 Buffalo Bill Reservoir – Shoshone River April through July inflow to Buffalo Bill Reservoir is forecast at 700,000 af, which is 94% of the 30-year average of 742,600 af.

 Boysen Reservoir – Wind River April through July inflow to Boysen Reservoir is forecast at 645,000 af, which is 104% of the 30-year average of 617,400 af.

 Bull Lake Reservoir – April through July snowmelt runoff into Bull Lake Reservoir from Bull Lake Creek is expected to be 135,000 af, which is 94% of the 30-year average of 143,800 af.

 Wind River – April through July snowmelt runoff into the Wind River above Bull Lake Creek is expected to be 415,000 af, which is 95% of the 30-year average of 437,900 af.

For additional information on Buffalo Bill, Boysen, and Bull Lake Reservoirs, contact Wyoming Area Manager Carlie Ronca at 307-261-5671.

For additional information on Yellowtail Reservoir, contact Montana Area Manager Steve Davies at 406-247-7298.

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